package com.qf.dao;

import com.qf.pojo.User;

/**
 * @author 千锋教育
 * @Company http://www.mobiletrain.org/
 * @Version 1.0
 */
public interface UserDao {
    long selectCountByUsername(String username);

    int insert(User user);

    User selectByUsernameAndPassword(String username, String password);
}
